AMFImporter: make test against nullptr dereferencing meaningful.

code/AMFImporter_Postprocess.cpp

@@ -261,21 +261,20 @@ size_t AMFImporter::PostprocessHelper_GetTextureID_Or_Create(const std::string&
 	size_t off_b = 0;
 
 	// Calculate size of the target array and rule how data will be copied.
-    if ( nullptr != src_texture ) {
-        if(!pID_R.empty()) {
-            tex_size += src_texture[0]->Data.size(); step++, off_g++, off_b++;
-        }
-        if(!pID_G.empty()) {
-            tex_size += src_texture[1]->Data.size(); step++, off_b++;
-        }
-        if(!pID_B.empty()) {
-            tex_size += src_texture[2]->Data.size(); step++;
-        }
-        if(!pID_A.empty()) {
-            tex_size += src_texture[3]->Data.size(); step++;
-        }
+    if(!pID_R.empty() && nullptr != src_texture[ 0 ] ) {
+        tex_size += src_texture[0]->Data.size(); step++, off_g++, off_b++;
     }
-	// Create target array.
+    if(!pID_G.empty() && nullptr != src_texture[ 1 ] ) {
+        tex_size += src_texture[1]->Data.size(); step++, off_b++;
+    }
+    if(!pID_B.empty() && nullptr != src_texture[ 2 ] ) {
+        tex_size += src_texture[2]->Data.size(); step++;
+    }
+    if(!pID_A.empty() && nullptr != src_texture[ 3 ] ) {
+        tex_size += src_texture[3]->Data.size(); step++;
+    }
+
+    // Create target array.
 	converted_texture.Data = new uint8_t[tex_size];
 	// And copy data
 	auto CopyTextureData = [&](const std::string& pID, const size_t pOffset, const size_t pStep, const uint8_t pSrcTexNum) -> void